USB Non-synchronous Notebook Computer Numeric Keyboard with 19 Keys

Features:
1. Ultra-thin computers caps design, Aesthetic appearance
2. Durable structure, long life
3. Non-synchronous digital input, no affection to the other keyboard

Specification:
1. Button design: 19 bonds
2. Key trip: 3.0 +/-0.3mm
3. Surcharging height: 0.25+/-0.05mm
4. MAX pressure: 55+/-5g
5. Operating temperature: 0-55 degree C
6. Key life: 800milliomon and above
7. Products size: 100*140*15mm